9.2 The Heart

When are the semilunar valves open?

• During ventricular relaxation

• During atrial contraction

• During ventricular contraction

• During atrial relaxation

Where are the semi lunar valves located?

• Between the atria and ventricles

• Between the atria, vena cava and pulmonary vein

• Between the ventricles, pulmonary artery and aorta

• Between the ventricles and atria

When are the AV valves closed?

• During ventricular contraction

• During atrial contraction

• During ventricular relaxation

• During atrial and ventricular relaxation

Which artery carries oxygenated blood away from the left ventricle?

• Vena cava

• Pulmonary vein

• Aorta

• Pulmonary artery

Where does the blood flow from the right ventricle?

• To the lungs

• To the pulmonary artery

• To the left atrium

• To the aorta

Which blood vessel brings deoxygenated blood back to the heart

• Pulmonary vein

• Vena cava

• Aorta

• Pulmonary artery

What is the function of the heart valves?

• To allow blood to flow in both directions

• To allow blood to flow in one direction only

• To control the rate of blood flow

• To increase heart pressure

Which blood vessel provides oxygenated blood to the heart muscle?

• Renal artery

• Pulmonary artery

• Aorta

• Coronary artery

A blockage in the coronary artery can lead to:

• Stroke

• Anaemia

• Deep vein thrombosis

• Heart attack

A heart attack is when:

• Oxygen supply is limited to the right atrium

• Carbon dioxide supply is limited to the left atrium

• Oxygen supply is limited to the heart muscle

• Carbon dioxide supply is limited to the heart muscle